Improvement in molds and cores for casting steel



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-W. KELLY.

Improvement in Molds and Cores for Casting Steel.

N0. 132,837. I Patented Nov.5,1872.

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w KELLY.

Improvement in Maids and Cures for Casting S tee|.

No. 132,837. Patented Nov.5,l872.

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UNITED STATES l/VILLIAM KELLY, OF LOUISVILLE, KENTUCKY.

Specification forming part ofLettc-rs Patent No. 132,837, dated November5, 1872.

To all whom it may concern:

Be it known that I, WILLIAM KELLY, of Louisville, in the county ofJefferson and State of Kentucky, have invented certain new and usefulImprovements in Making Steel Castings; and I do hereby declare that thefollowing is a full and exact description thereof, reference being hadto the accompanying drawing making a part of this application.

My invention relates to the manufacture of steel castings; and has forits objects to avoid porosity in castings that are quickly chilled, andat the same time so construct the molds that they may facilitate theprocess of casting; and to these ends my invention consists in theemployment, in combination with a copper mold or flask, of cores of sandor its equivalent-such as black lead, dried clay, or springmetal ringsaswill be hereinafter set forth. My invention further consists inproviding the flask with a removable or detachable gate and closingtongs, as and for the purposes presently to be explained.

It is frequently desirable, in making steel castings, to employ a copperflask on account of its peculiar properties for conducting off the heat;but, as the shrinkage is so rapid that, in many cases, it envelopsportions of the mold and renders the separation of the casting therefromwithout inj ury to one or both impossible, to avoid this difficulty Iconceived the idea of providing the mold with sand (or equivalent)cores, and have found from practical experience that the result issuccessful. I have also devised a novel means for operating the cope anddrag sides of the flask by the use of tongs, and making the drag half ofthe gate detachable, which, when secured in the manner to be hereafterexplained, is perfectly operative, and yet the operation of detaching itserves to open the flask'and lift the casting out.

To enable those skilled to more fully understand my invention I willproceed to describe the same, referring to the accompanying drawin g, inwhich- Figure 1 is a top view of a copper mold for making an ordinaryspoked wheel; Fig. 2 is a similar view with the cope removed; Fig. 3 isa top view of the cope; Fig. 4. is a side view of the mold looking intothe gate; Fig. 5, a section at the line as m, Fig. 1; Fig. 6, a sideview of a mold with the drag side of the gate detachable from the dragand supported by a stirrup; Fig. 7 is a front view of the same; and Fig.8 is a similar view with the stirrup removed and the mold provided withthe opening and closing tongs.

Similar letters indicate like parts in the several views.

A represents a copper mold, adapted to cast a spoked wheel. B is thecope or cover, provided with ears a a, having pin-holes therein, andadapted to lie over pins 1) b on corresponding ears 0 e on the drag sideof the mold; the cope extends over the gate, forming the upper or coverportion 0 thereof. 1) is the gate, which is shown in all the figures onSheet 1 as a part of the drag as at present made, while the figures onSheet 2 illustrate the peculiarities embraced in the second part of myinvention. The spaces between the parts of the mold intended to" formthe spokes of the wheel are filled with sand-cores B, which I have foundadvisable to make shell-like or hollow. G is a similar core, for makingthe hole in the center of the hub. In casting rapid castings in coppermolds the casting is liable to become attached to the gate, andsometimes the whole flask is destroyed in the endeavor to separate ittherefrom. To remedy this difficulty, I construct the gate separate, andsecure it in its proper relation to the flask by means of a stirrup, E,which is adapted to slide over the cope side 0 of the gate and allow thesame to have a free vertical playof about an inch, (more or less.) Thisspace is closed by a binding-wedge, or otherwise,'during the pouringoperation, thus holding the gate in position; or the stirrup may extenddown to the plane of the bottom of the flask, or be secured temporarilyin any other suitable way. The central portion of each half of the flaskis provided with a connecting-rod or screw-bolt, F, adapted to besecured to the legs of a pair of tongs, G, wh1ch are pivoted at H, andprovided with a lockinglink, J. Steadying-pins I I are arranged on theouter edge of each half of the mold, as shown, to prevent the same fromturning 1n the tongs. When the tongs are closed the pressure is central,thus effectually closm g the two halves of the flask; the tongs are heldtemporarily tight by the locking-link J. After the pour has beencompleted, the link J is removed and the upper leg of the tongs G openedslightly; this will remove partially the cope from the casting, and byacontinued movement of the tongs the hope is elevated until the portion 0comes in contact with the upper part of the stirrup and lifts it upward,which in turn lifts the casting from its bed.

I do not wish to be understood as claiming broadly the combination ofcopper in a sandmold for making steel castings, as this is shown anddescribed in Letters Patent granted to me on the 26th day of December,1871.

What I claim as new, and desire to secure by Letters Patent, is-

Inpresence of-- J. OOLEMANN, JNO. J. SLATTERY.

